Alternatives & variations Download PDF datasheet

GMI71

Russian high-power tetrode designed for pulse-modulator or pulse-power switching service in RF equipment, controlling high-voltage, high-current pulses rather than continuous linear amplification.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 26 V / 6 A

Description

The GMI71 is a high-current tetrode intended for pulse-power switching/modulator service.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: 26 V
Nominal heater current: 6 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Tetrode

X-ray radiationInterelectrode capacitances

Max plate voltage: 22000 V
Max plate dissipation: 125 W
Max cathode current: 85 A

Published pulse limits promoted; other grid and pulse timing data retained in parameters.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1968 Electronintorg

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristic

Heater current
5.6 A to 6.4 A
Negative grid 1 cutoff voltage maximum
900 V
Peak anode current minimum at 26 V heater
52 A
Peak anode current minimum at 23.5 V heater
42 A

Other

Peak grid 2 current maximum
10 A
Warm-up time minimum
240 s
Pulse duration maximum
25 us
Pulse frequency
200 pulse/s

Capacitance

Input capacitance maximum
120 pF
Output capacitance maximum
18 pF